Hadley, G. <br/><br/>
Variational Methods in Economics 
/ by  G. Hadley 
 - New York:  American Elsevier Publishing Co. Inc.;  1971. 
 - 378p. 
<br/><br/><label>ISBN: </label>0 7204 3601 X 
<br/><br/><label>Dewey Class. No.: </label>330  / HAD/V